Cleaner for buckets for excavating-machines.



PATENTED OCT. 23, 1906.

E. PIKE. r CLEANER EOEEUGKETS OE'EXCAVATING MACHINES APPLICATION FILEDFEBVQS, 1906l 2 EHBET-S-SHBET 1.

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No. 833,749. l PATEN'IBD OCT. 23, 1906.

H. PIKE. CLEANER FUR BUGKETS OF EXGAVATING MACHINES.

APPLICATION I'ILBD 11213.23, 1906.

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UNITED STATES Y PATENT OFFICE,

HOWARDPIKE, OF CHICAGO, ILLINOIS, ASSIGNOR TO F. C. AUSTIN DRAINAGEEXCAVATOR COMPANY, OF CHICAGO, ILLINOIS, A

CORPORATION OF ILLINOIS.

Specification of Letters Patent.

Patented Oct. 23, 1906.

Application led February 23, 1906. Serial No. 302,529.

To all whom t may concern;

Be it known that I, HOWARD PIKE, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Cleaners for the Bucketsof Excavating-Machines, of which the following is a specification.

My invention relates to excavating-mae chines of that type whereinself-dumping scoops or buckets are employed, and has reference moreparticularly to a means for insuring the complete discharge ofthecontents of the bucket at its intended point of delivery.

It has been found in practice that when operating upon certain kinds ofsoil, such as sticky clay, the inversion of the bucket above theintended point of delivery is insufficient to effect the completedischarge of the contents, some of which tend to adhere to the bottomand rear walls of the bucket. To remedy this, I have provided, inassociation with that part of the machine which effects or permits theinversion of the bucket, a scraper device which automatically engagesthe bottom wall of the bucket at or near its forward cutting edge and asthe bucket is inverted in the discharging operation scrapes the bottomand rear wall thereof to an extent sufficient to detach and break up anysticky portions of the load and insure their delivery.

My invention is applicable to any excavating-machine employing areciprocatory scoop and effecting the discharge of the load by a partialor complete inversion `of the scoop at the end of its travel 5 but forconvenience of illustration I have shown my improvements as applied toand embodied in a machine such as is shown in Reissue Letters Patent toCharles C. Jacobs, No. 12,441, granted January 30, 1906.

In the accompanying drawings, whichillustrate the preferred mechanicalembodiment of the invention, Figure 1 is a side elevational view of theend portion of a bucket-support and guide, showing the bucket-invertingdevices and my improved cleaning device applied thereto and just ab outto engage a loaded bucket. Fig. 2 is an outer end view of the same. Fig.3 is a top plan view, partly broken out, of the bucket guiding andsupporting track. Fig. 4 is a longitudinal sectional view of Fig.

1, showing the bucket partly in side elevation and in the dischargingposition, and Fig. 5 is a cross-sectional view through the.bucketsupporting track, illustrating the general form and constructionthereof.

Referring to the drawings, 6 designates each of a pair of parallelchannel-shaped tracks, on which travel the wheels of a truck 7, in andbetween the side frame members of which is pivotally mounted at 8 anopenfaced bucket or scoop 9 having a lower forward cutting edge 10 and arounded bottom and rear wall, (indicated at 11.)

Secured to and depending from the end portion of the track is abucketdischarging device, comprising substantially a pair of V-shapedframes 12, secured to the track members themselves, respectively. Thelower supporting-rails of the tracks 6 are notched at 13, and the lowerbars of the V-shaped frames 12 are joined thereto at points coincidentwith the lower edges of the notches, as shown in Fig. 4. The forwardwheels of the truck are of a width to pass through the notches 13, whilethe rear wheels are of wider tread and will ride over said notches. Anoperating-cable 14 is attached at or near the rear end of the scoop andpasses over a guide-sheave 15 at the end of the track, being led thenceto a suitable windingdrum. (Not shown). From the foregoing construction,for a more complete description of which reference may be had to theLetters Patent above specified, if desired, it will be seen that as theloaded bucket is drawn up the inclined track when it reaches the pointindicated in Fig. 1 the forward wheels will drop through the rails ofthe main track and onto the lower bars of the V-shaped discharge-frames,the continued upward travel of the rear portion of the truckeffecting aninversion of the bucket above the intended point of discharge, as shownin Fig. 4.

Referring now more particularl to those features of improvement whereint e resent invention resides, 16 designates eac of a pair of arms thatare secured at their lower ends on a transverse hinge-pintle 17,journaled in downward-extensions 12a of the outer members of theV-shaped frames 12. The inner or upper ends of said arms are connectedby a transverse plate 18, constituting a scraper. To the outeroverhanging ends of the hinge-pintle 17 are secured stops 19, which bycontact with the outer sides of the frame-bars 12 limit the drop of thescraperplate 18 to the position shown by dotted ines in Fig. 1.

- In operation `as the bucket or scoop reaches the point at which theforward wheels of its truck-frame drop through the notches 13 theforward edge of the scraper 1S is engaged by the forward cutting edge ofthe scoop in the manner clearly indicated in Fig. 1, and as the bucketenters the discharging device said scraper moves rearwardly over andrelatively to the concave bottomand rear wall of the scoop in the mannerclearly indicated in Fig. 4, thereby detaching and loosening up anysticky portions of the load that may tend to adhere to said Wall andinsuring a free and full discharge of the load by gravity. As the emptybucket is retracted the scraper automatically drops by gravity to theposition shown 1n Fig. 1, ready for a similar operation upon the nextbucket-load of material.

From the foregoing it will be seen that the bucket cleaner of myinvention always maintains itself in a position favorable for actionupon the loaded bucket as the latter reaches the point of discharge andengages and operates upon said bucket in an entirely automatic manner.The open-work or skeleton form of cleaner shown is preferred and has adistinct advantage in that it allows the dirt or clay detached from thewall of the bucket by the scraping-blade to readily fall throughthecleaner and clear the machine.

While I have shown what I consider to be the best location and practicalconstruction of cleaner for coperation with a bucket of the particularform herein shown, yet it will be understood that this particularconstruction and location might be varied to adapt it to coperate withother forms of buckets and bucket-inverting devices without departingfrom the spirit and principle of the invention so long as the cleanerautomatically engages and rides over one or more walls of the bucket asthe latter is being inverted.

I claim- Y Y 1. The combination with an eXcavatorbucket and means foreffecting the inversion thereof, of a cleaner pivotally mounted eX-ternally of said bucket, said cleaner having an operating edge adaptedto engage the forward edge of the bottom Wall of the bucket and scrapeover said bottom wall during the inverting of the bucket, substantiallyas described.

2. The combination with a bucket guiding and supporting track, a bucketmounted to travel thereon, and a device for effecting the inversion ofthe loaded bucket at a point on said track, of a cleaner mounted on saidbucket-inverting device and adapted to engage the forward edge of thebottom wall of the bucket and scrape over the same rearwardly during theinverting of the bucket, substantially as described.

3. The combination with a bucket guiding and supporting track, a bucketmounted to travel thereon, and a frame depending from said track adaptedto guide the forward edge of the bucket in the discharging operation, ofa cleaner mounted on said depending frame adapted to engage the forwardedge of thebottom wall of the bucket and scrape over said bottom wallduring the inverting of the bucket, substantially as described.

4. The combination with a bucket guiding and supporting track, a bucketmounted to travel thereon, and a frame depending from' said trackadapted to guide the forward edge of the bucket in the dischargingoperation, of a scraper pivotally mounted on said depending frame andnormally lying in the path of the forward cutting edge of the bucket asthe latter enters upon said depending frame, said scraper sliding overthe bottom wall of the bucket during the inverting of the latter,substantially as described.

5. The combination with a bucket guiding and supporting track, a bucketmounted to travel thereon, and a frame depending from said track adaptedto guide the forward edge of the bucket in the discharging operation, ofa scraper pivotally mounted on said depending frame and normally lyingin the path of the forward cutting edge of the bucket as the latterenters upon said depending frame, and means limiting the swingingmovement of said scraper, substantially as described.

HOWARD PIKE. Witnesses:

SAMUEL N. POND, FREDERICK C. GOODWIN.

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